Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures
PPO-inhibiting herbicides in combination with glyphosate for postemergence applications is a common approach to manage glyphosate- and ALS-inhibitor-resistant weeds. PPO-inhibitors can reduce glyphosate translocation when applied in tank-mixtures, but adjuvants may be used to overcome this effect. A...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/4/754 |
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| author | Jesaelen G. Moraes Thomas R. Butts Vitor M. Anunciato Joe D. Luck Wesley C. Hoffmann Ulisses R. Antuniassi Greg R. Kruger |
| author_facet | Jesaelen G. Moraes Thomas R. Butts Vitor M. Anunciato Joe D. Luck Wesley C. Hoffmann Ulisses R. Antuniassi Greg R. Kruger |
| author_sort | Jesaelen G. Moraes |
| collection | DOAJ |
| description | PPO-inhibiting herbicides in combination with glyphosate for postemergence applications is a common approach to manage glyphosate- and ALS-inhibitor-resistant weeds. PPO-inhibitors can reduce glyphosate translocation when applied in tank-mixtures, but adjuvants may be used to overcome this effect. Additionally, optimal droplet size may be affected by tank-mixtures of different herbicides and it can be crucial to herbicide efficacy. Field and greenhouse studies were conducted to investigate the impact of nozzle selection and adjuvants on weed control and interactions when applying PPO-inhibitors (fomesafen or lactofen) alone or in tank-mixture with glyphosate to five weed species using six nozzle types. Ultra-coarse droplets were just as effective as medium droplets regardless of the spray solution, but have a lower likelihood of off-target movement. Tank-mixtures applied were consistently antagonistic to common lambsquarters, horseweed, and Palmer amaranth. Only fomesafen was antagonistic to kochia whereas synergistic interactions were observed when glyphosate plus lactofen were applied in combination with COC, DRA + COC, or NIS. Separate applications are advisable with herbicide- and weed-specific situations to avoid antagonism, which is necessary to achieve optimum weed control and maintain the effectiveness of PPO-inhibitors. Future research should continue to look at these important interactions across a wide range of weed species. |
| first_indexed | 2024-03-10T12:21:54Z |
| format | Article |
| id | doaj.art-1d9ab86a44e94af2bbe1a97c2f768027 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T12:21:54Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-1d9ab86a44e94af2bbe1a97c2f7680272023-11-21T15:24:05ZengMDPI AGAgronomy2073-43952021-04-0111475410.3390/agronomy11040754Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-MixturesJesaelen G. Moraes0Thomas R. Butts1Vitor M. Anunciato2Joe D. Luck3Wesley C. Hoffmann4Ulisses R. Antuniassi5Greg R. Kruger6Department of Agronomy and Horticulture, University of Nebraska-Lincoln, North Platte, NE 69101, USADepartment of Agronomy and Horticulture, University of Nebraska-Lincoln, North Platte, NE 69101, USADepartment of Plant Protection, Sao Paulo State University, Botucatu, SP 18618687, BrazilDepartment of Biological System Engineering, University of Nebraska-Lincoln, North Platte, NE 69101, USAUSDA-ARS Aerial Application Technology Research Unit, College Station, TX 77845, USADepartment of Rural Engineering, Sao Paulo State University, Botucatu, SP 18618687, BrazilDepartment of Agronomy and Horticulture, University of Nebraska-Lincoln, North Platte, NE 69101, USAPPO-inhibiting herbicides in combination with glyphosate for postemergence applications is a common approach to manage glyphosate- and ALS-inhibitor-resistant weeds. PPO-inhibitors can reduce glyphosate translocation when applied in tank-mixtures, but adjuvants may be used to overcome this effect. Additionally, optimal droplet size may be affected by tank-mixtures of different herbicides and it can be crucial to herbicide efficacy. Field and greenhouse studies were conducted to investigate the impact of nozzle selection and adjuvants on weed control and interactions when applying PPO-inhibitors (fomesafen or lactofen) alone or in tank-mixture with glyphosate to five weed species using six nozzle types. Ultra-coarse droplets were just as effective as medium droplets regardless of the spray solution, but have a lower likelihood of off-target movement. Tank-mixtures applied were consistently antagonistic to common lambsquarters, horseweed, and Palmer amaranth. Only fomesafen was antagonistic to kochia whereas synergistic interactions were observed when glyphosate plus lactofen were applied in combination with COC, DRA + COC, or NIS. Separate applications are advisable with herbicide- and weed-specific situations to avoid antagonism, which is necessary to achieve optimum weed control and maintain the effectiveness of PPO-inhibitors. Future research should continue to look at these important interactions across a wide range of weed species.https://www.mdpi.com/2073-4395/11/4/754air inclusion nozzlecrop oil concentratedrift reducing adjuvantmethylated seed oilnon-air inclusion nozzlenon-ionic surfactant |
| spellingShingle | Jesaelen G. Moraes Thomas R. Butts Vitor M. Anunciato Joe D. Luck Wesley C. Hoffmann Ulisses R. Antuniassi Greg R. Kruger Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures Agronomy air inclusion nozzle crop oil concentrate drift reducing adjuvant methylated seed oil non-air inclusion nozzle non-ionic surfactant |
| title | Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures |
| title_full | Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures |
| title_fullStr | Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures |
| title_full_unstemmed | Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures |
| title_short | Nozzle Selection and Adjuvant Impact on the Efficacy of Glyphosate and PPO-Inhibiting Herbicide Tank-Mixtures |
| title_sort | nozzle selection and adjuvant impact on the efficacy of glyphosate and ppo inhibiting herbicide tank mixtures |
| topic | air inclusion nozzle crop oil concentrate drift reducing adjuvant methylated seed oil non-air inclusion nozzle non-ionic surfactant |
| url | https://www.mdpi.com/2073-4395/11/4/754 |
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